Packet data convergence protocol PDCP entity and execution method thereof

A packet data and convergence protocol technology, applied in digital transmission systems, using return channels for error prevention/detection, network traffic/resource management, etc., can solve problems affecting wireless link transmission delay and reliability, PDCP PDU exceeding the validity period, etc. question

Inactive Publication Date: 2015-09-23
SHARP KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the t-Reordering timer is set to a large value, PDCP PDUs not received in order will exceed their validity period due to waiting in the retransmission buffer for deleted or lost PDCP PDUs, thereby affecting the transmission delay of the wireless link and reliability

Method used

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  • Packet data convergence protocol PDCP entity and execution method thereof
  • Packet data convergence protocol PDCP entity and execution method thereof
  • Packet data convergence protocol PDCP entity and execution method thereof

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Embodiment Construction

[0029] In the following, the principle and implementation of the present invention will become apparent by describing specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the present invention should not be limited to the specific examples described below. In addition, for the sake of brevity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion to the understanding of the present invention.

[0030] The following takes the LTE Rel-12 mobile communication system and its subsequent evolution versions as an example application environment, and specifically describes multiple embodiments of the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as future 5G cellular communication systems.

[0031]...

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Abstract

Disclosed are an execution method of a Packet Data Convergence Protocol (PDCP) entity and a corresponding entity apparatus. The method includes: mapping a PDCP Protocol Data Unit (PDCP PDU) which is received from a lower entity of a PCDP entity and arrives in disorder onto a PDCP Service Data Unit (PDCP SDU) and storing PDCP SDU in a reorder buffer; judging whether the serial number of a missing PDCP SDU is smaller than the smaller one of the biggest serial number of the PDCP SDUs respectively received from two lower entities by the PDCP entity; and if the serial number of the missing PDCP SDU is smaller than the smaller one, delivering to a higher layer entity of the PDCP entity the PDCP SDU stored in the reorder buffer with the serial number smaller than the serial number of the missing PDCP SDU, and the PDCP SDU with the serial number bigger than the serial number of the missing PDCP SDU and continuous with the missing PDCP SDU.

Description

technical field [0001] The present invention relates to mobile communication, and specifically relates to a packet data convergence protocol PDCP entity and its execution method, which are used to enable the PDCP entity on the receiving side to deliver PDCP SDUs not received in sequence to the upper layer as soon as possible. Background technique [0002] The Layer 2 (1ayer2) User-Plane Protocol Stack (User-Plane Protocol Stack) of the 3rd Generation Partnership Project (3GPP) Long-Term Evolution (LTE) system consists of 3 sub-layers, from high to low: Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) layer, radio link control (Radio Link Control, RLC) layer and media access control (Media Access Control1) layer. At the sending end, the service data unit (Service Data Unit, SDU) is received from the upper layer, the service is provided for the layer, and the protocol data unit (Protocol Data Unit, PDU) is output to the lower layer. For example: the R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/06
CPCH04L1/1874H04L47/34H04L47/624
Inventor 肖芳英刘仁茂
Owner SHARP KK
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